About null

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JDO Doc
6

javax.jdo.JDONullIdentityException

constructor parameter is null. This might occur when creating an object id instance from a transient instance where an identity field is null. Since: JDO 2.0 JDONullIdentityException() Constructs a new ... . Returns: the detail message string of this Throwable instance (which may be null). Since: Java
JPA Doc
6

javax.persistence.criteria.ParameterExpression

the alias assigned to the tuple element or null, if no alias has been assigned. Return the alias assigned to the tuple element or null, if no alias has been assigned. Returns: alias Since: JPA 2.0 List ... String getName() Return the parameter name, or null if the parameter is not a named parameter or
JPA Doc
6

javax.persistence.EntityExistsException

EntityExistsException exception with null as its detail message. Constructs a new EntityExistsException exception with null as its detail message. Since: JPA 1.0 EntityExistsException(String message ... .printStackTrace() Throwable getCause() Returns the cause of this throwable or null if the cause
JPA Doc
6

javax.persistence.EntityNotFoundException

) EntityNotFoundException() Constructs a new EntityNotFoundException exception with null as its detail message. Constructs a new EntityNotFoundException exception with null as its detail message. Since: JPA 1.0 ... .printStackTrace() Throwable getCause() Returns the cause of this throwable or null if the cause
JPA Doc
6

javax.persistence.LockTimeoutException

. Since: JPA 2.0 LockTimeoutException() Constructs a new LockTimeoutException exception with null as its detail message. Constructs a new LockTimeoutException exception with null as its detail message ... the cause of this throwable or null if the cause is nonexistent or unknown. Returns the cause
JPA Doc
6

javax.persistence.NonUniqueResultException

() Constructs a new NonUniqueResultException exception with null as its detail message. Constructs a new NonUniqueResultException exception with null as its detail message. Since: JPA 1.0 ... () Throwable getCause() Returns the cause of this throwable or null if the cause is nonexistent or unknown
JPA Doc
6

javax.persistence.NoResultException

with null as its detail message. Constructs a new NoResultException exception with null as ... .Throwable.printStackTrace() Throwable getCause() Returns the cause of this throwable or null if the cause is nonexistent or unknown. Returns the cause of this throwable or null if the cause is nonexistent
JPA Doc
6

javax.persistence.OptimisticLockException

) OptimisticLockException() Constructs a new OptimisticLockException exception with null as its detail message. Constructs a new OptimisticLockException exception with null as its detail message. Since: JPA 1.0 ... () Throwable getCause() Returns the cause of this throwable or null if the cause is nonexistent or unknown
JPA Doc
6

javax.persistence.PersistenceException

. Since: JPA 1.0 PersistenceException() Constructs a new PersistenceException exception with null as its detail message. Constructs a new PersistenceException exception with null as its detail message ... the cause of this throwable or null if the cause is nonexistent or unknown. Returns the cause
JPA Doc
6

javax.persistence.PessimisticLockException

() Constructs a new PessimisticLockException exception with null as its detail message. Constructs a new PessimisticLockException exception with null as its detail message. Since: JPA 2.0 ... () Throwable getCause() Returns the cause of this throwable or null if the cause is nonexistent or unknown